Pipe coupling



C. T. SMITH PIPE COUPLING April 13 1926. 1,580,694

' Filed March 12, 1925 a .7 FE? 6" y 1% if %m fiwm.

Patented Apr. 13 1926. 7

UNITED STATES PATENT OFF-ICE.

CHARLES '1. SMITH, OF CLEVELAND HEIGHTS, OHIO, A SSIGNOR OF ONE-HALF TO HARVEY K. RUSSELL, F CLEVELAND, OHIO.

PIPE COUPLING.

Application filed March 12, 1925. Serial No. 15,091.

To 'all whom it may concern:

Be it known that I, CHARLES T. $M1TH,

citizen of the United States, residing at Cleveland Heights, in the county of Guyahoga and State of Ohio, have invented certain new and useful Improvements in Pipe Couplings, of which the following is a specification. This invention relates to couplings for connecting a pipe orhose with a fluid supply source, and it is particularly adapted for use in connection with pneumatic tools.

The primary object of the invention is to provide a coupling that will prevent the escapement of fluid when the .tool carrying member is disconnected from the supply member.

the invention consists in the novel construction ,of a cou ling providing a valve adapted to be seated Ev fluid pressure to prevent the escape of the fluid when the coupling is disconnected, and adapted to be automatically raised from its seat upon connecting the tool carrying terminal member and the supply member.

The invention further'consists in the peculiar arrangement and combination of the various parts of the coupling, and in certain details of construction as will be hereinafter fully described and especially pointed out in the appended claims, reference being had to the accompanying drawing which is made part of the specification and in which similar reference characters are employed to designate corresponding parts.

In the said drawing,-Figure 1 is an elevation of the improved coupling. Fig. 2 is a. central vertical section through the c ou-,

pling. Fig. 3 illustrates the tool connection and the supply connection uncoupled, with the supply connection in central verticalsection. Fig. 4 isan elevation taken at right angles to that shown in Fig. 1. Fig. 5 is a cross-section'on line 5-5 of Fig. 2. Fig.- 6

isan interior end view of the stem element of the fluid supply element. Fig. 7 is a face view. of the valve member. 1 Fig. 8 is a side view of said yalve. Fig. 9 is a face view of a modified valve, and Fig. 10 isa side view of the modified valve.- p

The present embodiment "of the invention comprises a stem element 1 adapted for con-' nection witha pipe, not shown, which leads to the supply source. Thestem 1 is threadseat at 2?, and thereby ed into a valve casing 2. I The casing 2 is provided with a reduced part which forms a valve seat 2 and is internally threaded, preferably with a quick thread, as shownat 2 At the terminal of the-thread 2 is an annular groove 2 which provides a seat for packing 3. A sleeve 4 is mounted on the .member 2 and is adapted to slide longitudiprovided on the element 2, and on a shoulder v 7 4 providedonthe sleeve'4. With this as a principal object in view,

The, tool carrying member comprises a stem 6 adapted to be connected with a hose, not shown, which is connected with the too]. An extension 6 of the stem 6 is adapted to of the valve casing 2, and a flange 6 forms a retainer for a sleeve 7 which is provided with a'thread '7 adapted to operate in the thread 2". The sleeve 7 is held on the stem 6 by anannular lip 7 which bears on the flange 6 and allows said sleeve 7 to be rotated on the stem' 6. A tongue 7 formed onth. sleeve 7 'is adapted to engage a recess 4 rovided on the sleeve 4.

The valve 8, pre erably made of sheetmetal, is formed with a disc 8' with a plurality of legs 8 extending therefrom and adapted to slide longitudinally on the wall 2 of an annular recess formed in 'the, casing. A modified form of valve is provided shown in Figs. 9 and 102 This construction provides a disc 8 having a skirt 8' through which isa plurality of apertures 8... Lugs 6 are formed on the interior end of the element 6, said lugs being ada ted to bear on the disk 8 of the valve, an unseat-said valve when the sleeve 7 is threaded into the casing 2, .thus allowing the fluid from the supply source to pass freely through the coupling. Lu provide stops or the .valve 8.

When the toolicarrying member is freed from the izsupply f nember, and anterior to.

r the complete uncou ling of the members, the

lugs 6 are carrie away from the valve 8 and the fluid .pressure, in the'direction of arrows, Figs.-2and 3, causes saidyalve to revent the escapement of the fluid from t e' supply source.

1 on the stem element 1' bers.

The dislodgement of the sleeve 4 from the casing 2 is prevented by a lip 4 turned inward from said sleeve and engaging a longitudinal groove 2 in the casing. The limit of longitudinal travel of the sleeve 4 is controlled by the lip 4 contacting the abutments 2 This construction also provides for locking the coupling in a closed condition, in as much as it co-acts with the engagement of the sleeve 7 with the sleeve 4;

When the sleeve 7 is being threaded into the casing 2 the tongue 7 is disengaged from the recess 4. This is brought about by sliding the sleeve '4 longitudinally away from the sleeve 7-. And when the sleeve 7 has reached its threaded limitation in the caslng 2 the recess 4 is brought into engagement with the tongue 7 automatically through the action of the spring 4, and the rotation of the elements, relative to each other, is prevented by the engagement of the lip 4 with the groove 2*, co-acting with the engagement of tongue 7 with recess 4. In the processof uncoupling, the initial operation is the disengagement of the tongue 7 from the recess 4, which is brought by manually shifting the sleeve 4 and compressing the spring 4*.

In uncoupling the members the valve becomes seated and the fluid from the supply is arrested before the members are completely disengaged. To relieve the residual pressure, a port 6 is provided in the elementlfi. This port is so positioned that-it "will pass the packing 3' and communicate with a port 2 provided in the'valvecasing 2, and relieve the residual pressure anterior to the complete disengagement of the mem- The excess fluid in the tubular element 6 is exhausted through the ports 6 and 2 into the annular space between the valve casing 2 and the sleeve 4, and the clearance suroundin the abutment element, or elements, 2 provldes for the escapement to the outer atmosphere. the excess fluid serves as a scavenger for the spring 4 and the spring chamber.

What I claim and desire to secure by Letters Patent is:

1. In a coupling of .the class described, the combination of a valve casing provided with tubular means for connection to a fluid supply source, said casing being internally threaded and having a reduced part forming a valve seat, a floating valve in said casing adapted to be seated by fluid pressure from the supply source, a packing element at the inner terminal of the thread in said casing,-

a second member of tubular form provided with means for connection to a fluid oper ated device, an externally threaded sleeve carried by the second connecting member andada'pted to be threaded into the valve casing and contact the packing, and means provided by said second connecting mem-v The exhaust of her for opening the valve against the fluid pressure when the threaded connection is made between said member and the valve casing.

2. A coupling of the class described, comprising two co-operating coupling members, one of said members providing a valve casing of tubular formation, having a stem adapted for connection with a fluid supply source, said casing being internally threaded for a distance from one end, and having a reduced portion forming a valve seat and an annular chamber in juxtaposition to the opposite end, a floating valve in said chamber said valve being held on the seat and closed by fluid pressure when the cooperating members are uncoupled, the second co-operating member comprising a tubular element providing a stem for connection with a fluid operated device and adapted to enter the bore of the valve casing, an externally threaded/ sleeve carried by said last named tubular element, adapted to threaded con-- nection with the valve casing, means provided on the interior terminal of the last named tubular element for longitudinally unseating the valve when the two co -operat ing members are coupled, stop means for ing having tubular means for connection to v a fluid supply source, said casing being threaded from one end thereof and having a reduced part forming a valve seat oppositely disposed relatively to the threaded portion, a valve in said casing adapted to be seated byfluid pressure from the supply source, a packing element at the terminal of the thread in said casing, a second coupling member of tubular form provided with means for connection to a fluid operated device, and adapted toextend into the bore of the reduced portion of the first named coupling member, an externally threaded sleeve carried by the second tubular memberand adapted to be threaded into the valve casing and contact the packing, a port in the extended part of the second tubular member, which is closed when the two co-operating members are coupled, and adapted to communicate with a port provided in the valve casing, when the valve is closed and the members are being uncoupled, and means provided on the extended part of the second coupling member for opening the valve when the threaded connection is made between said member and the valve casing. i 4. A coupling of the class described, comprising two'co-opgrating coupling members, one of said mem rs being provided with a MID valve, means for packing the joint when the two members are engaged, threaded means for engaging the two members and opening the valve, said means being operative Without rotating either member, and means for relieving residual pressure after the valve is seated.

5. A coupling of the class described, comprising two co-operating coupling members, one of said members being provided with a valve, means for packing the joint of the two members when engaged, threaded means for engagement of the two members. and

openin the valve, said means being operated without rotating either member, means for relieving residual ressure after the valve is seated, and locking means for pre- CHARLES '1. SMITH. 

